Electric pump.



No. 779,623. PATENTED JAN 10, 1905. E. F. EORTER.

ELECTRIC PUMP.

APPLICATION FILED FEB. 9, 1903.

No. 779,623. Patented January 10, 1905.

UNITED STATES PATENT OEEIcE.

EDWIN F. PORTER, OF BOSTON, MASSACHUSETTS, ASSIGNOR, BY MESNEASSIGNMENTS; TO PORTER AIR COMPRESSOR COMPANY, OF KITTERY, MAINE, ACORPORATION OF MAINE.

ELECTRIC PUMP.

SPECIFICATION forming part of Letters Patent No. 779,623, dated January10, 1905.

Application filed February 9, 1903. Serial No. 1%,461.

T W710? it y 007106771! is caused to maintain its position against theBe itknown thatI, EDWIN F. PORTER, asubpiston by the tension of thespring P. ject of the King of Great Britain, residing at Q is afeed-pipe controlled by the puppet- Boston, (DOICl1GSt81,) in the countyof Suffolk valve R.

5 and State of Massachusetts, haveinvented cer- S is a delivery-pipe,also controlled by the tain new and useful Improvements in Electricvalve T. Pumps, of which the following is a specilica- U is an ordinaryelectric motor whose artion. mature is made fast to the shaft U of thero- My invention relates to new and useful imtary pump. IO provementsfor automatically controlling the V V are two springs upon which arepivoperation of a pump, and which has for its oted at V V thetoggle-joint V". The center object the provision of a varying supply ofof the toggle-joint is pivoted at V to the rod air at a constantpressure, said pressure to be TV, which rod is located at and made fastto maintained automatically by varying the electhe center of thediaphragm WV, which is fas- 5 tric current by which the device isoperated. tened to the open end of the chamber VV Another object is toautomatically connect which chamber is connected by the pipe IV anddisconnect the circuit as the supply of air to the pipe S, leading fromthe pump at IV". is to be turned on or discontinued. The lever E is alsopivoted to the rod at My invention consists of certain novel feathepoint E and to the spring V at E The 20 tures hereinafter described, andparticularly extension V of the toggle-joint V operates pointed out inthe claims. the switch-lever X and in the position shown In theaccompanying drawings, which illusin Fig. 1 closes the circuit throughthe brushes 7o trate aconstruction embodying my invention, X X The air,which comes from the pump Figure 1 is a side elevation of the apparatusK through the pipe and enters the pipe 5 in combination with a rotarypump and air- IV", is vented from the perforations WV, passcleansingapparatus. Fig. 2isacross-section ing through the liquid out through theof the pump, showing its working parts. Fig. pipe IV from the receptacleIV for any de- 7 5 3 is a longitudinal sectional view of part of sireduse. the air-conduit, showing the governor-rod and In Fig. l thediaphragm W" is arched by a 30 small fan for its rotation. Fig. tis aview of greater pressure of the air and has caused the the switch andtoggle-joint, showing the same toggle V to pass its center, forcing inso doin their upper position. Fig. 5 is a sectional ing the springs V Vapart. The return of 80 view hereinafter described. Fig. 6 is adethesespringscarries thetogglestillfarther up, tail plan view ofaspider-support hereinafter bringing the extension V against the lower35 d ib d, projection of the lever X and causing a quick Like letters ofreference refer to like parts break of the circuit at the brushes X X.throughout the several views. The full operation of the device is asfol- A represents a fly-ball governor which oplows: The air being pumpedby, we will say erates the lever B, which lever moves over the themedium speed of the motor, it is desired 4 sliding contacts Cof therheostat D. E is anto get a greater supply without diminishing otherlever which in like manner moves over the pressure or increasing thesame. \Vhen the sliding contacts F of the rheostat G. the organ isopened up for more air, as in H isa small propeller-wheel which is madeorgan-blowing, for instance, by pressing a fast to the governor-shaft I,which is stepped greater number of keys the current of air is 45 in thebearing J, as shown in detail in Fig. 3. accelerated momentarily in thepipe XV,

K is a rotary pump which consists of the speeding the fan-wheel H, andthereby the casing L, which includes the eccentric piston governor A,causing the lever B to move M, operatingon the slidingaloutmentN, whichdownward over the contacts C, cutting out resistance and causing themotor to speed. The reverse motion of the lever B is caused, of course,by using less air, and the motor is slowed. It will be seen that bythese parts the motor is made to automatically keep pace with therequirement for air. If the operation of the lever B on the contacts Cshould cause any slight rise or fall of pressure, this will be correctedby the lever E, which is operated by the varying pressure through thediaphragm N. If the pressure rises a little more, resistance is added tothe circuit at this point, just enough to correct any error that may bemade in cutting out resistance D, as the resistances D and F are both inseries with the motor. If the air is entirely shut ofl viz., if there isnone being used while the motor is run ning-the diaphragm WV will risewith the increased pressure suddenly and carrying the toggle V by thecenter will open the switch by moving the lever X and releasing it fromcontact with the brushes X X The levers X, E, and B being partly in theelectric circuit are properly insulated. It is of course obvious thatwhen the use of air is resumed the pressure will go down to the normalpoint, allowing the diaphragm to descend, which it does by its tension,drawing down the toggle V and again starting the motor by throwing theswitch-lever X.

Referring to Fig. 2, there is shown in'section an oiling deviceconsisting of a trap or reservoir S in communication with the shaft U bythe duct S which is connected to the oiling-hole U The operation of thisdevice is as follows: Oil for lubricating the pump is admitted at theintake Q and enters the pump and vents through the pipe S into the trapS. This pipe S being the vent-pipe of the pump will of course containair or gas under pressure, which pressure will act on the surface of theoil S in the reservoir S and force said oil back into the pump forlubrication through the duct S to be pumped out again as abovedescribed, and will thereby circulate through the pump. There aretwoducts from the reservoir communicating with both bearings of thepump, only one being shown in the drawings, as the other is a duplicateof it.

Fig. 5 represents a modification of the receptacle VV' and consists oftwo receptacles w and w, placed in series, communication between the twobeing through the tube 20 both legs of which extend to the bottom of thereceptacles. The feed-pipe w communicates with the top of the receptaclew, and the vent-pipe w" communicates with the top of the receptacle w.The operation of this device is as follows: The fluid for the washing ofthe air is placed in the receptacle w, and air being forced through thesystem bubbles up through this fluid and vents through the pipe 10 If,however, the pump with which this device is connected is brought to astandstill and the air in the reservoir supplied by the tube 10 isliable to make back, due to leakage or other cause, the fluid in thereceptacle w will be carried over into the receptacle '20, which is ofsufficient capacity to contain it. This fluid is thereby prevented frombeing carried back into the pump by such back action of air, which isthe object of this device.

The rotary pump herein shown and de scribed is not claimed in thisapplication, but forms the subject-matter of another application filedMarch 4:, 1903, Serial No. 146,218.

I do not limit myself to the arrangement and construction shown, as thesame may be varied without departing from the spirit of my invention.

Having thus described the nature of my invention and set forth aconstruction cmbodying the same, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

1. In an apparatus of the character described, a pump, a source of powerfor operating said pump, and means operated by the flow of the fluidthrough the pump and by the pressure produced by the pump for varyingthe action of said pump.

2. In an apparatus of the character described, a pump, a source of powerfor operating said pump, and means operated by the flow of fluid throughthe pump to control the motion of the pump.

3. In an apparatus of the character described, a pump, a source of powerfor operating said pump, means operated by the flow of fluid through thepump to control the motion of the pump, and means operated by thepressure produced by the pump for varying the action of the pump.

4:. In an apparatus of the character described, a pump, an electriccircuit for operating said pump, means operated by the flow of fluidthrough the pump to control the 1110- tion of the pump, and meansoperated by the pressure produced by the pump for varying the action ofthe pump, both of said means controlling rheostats in series in the samecircuit.

5. In an apparatus of the character described, a pump, a source of powerfor operating said pump, and a rheostat operated by the flow of fluidthrough the pump for controlling said pump.

6. In an apparatus of the character de scribed, a pump, a source ofpower for operating said pump, a controlling-rheostat operated by theflow of fluid through the pump for controlling the motion of said pump.

7. In an apparatus of the character described, a pump, an electriccircuit for operating said pump, and a toggle-joint operated by the flowof fluid through the pump to make and break the circuit.

8. In an apparatus of the character de' scribed, a pump, an electriccircuit for operating the pump, a toggle-joint operated by the flow offluid through the pump to make and break the circuit, and a spring toamplify the ating said. pump, means operated by the flow of fluidthrough the pump for controlling the motion of the pump, and meansoperated by the pressure produced by the pump for disconnecting saidsource of power.

In testimony whereof I have signed my name to this specification, in thepresence of tWo subscribing Witnesses, this 16th day of January,

EDWVIN F. PORTER. l/Vitnesses:

E. L. HARLOW, A. L. Mmssnn.

